1. –/2 points Notes Question: Walker4 21.P.058. Find the magnitude and direction of the current in the figure below, where R = 9.50 Ω and = 12.5 V. Magnitude A Direction 2. –/4 points Notes Question: Walker4 21.P.059. Suppose the polarity of the battery in the figure below is reversed, where R = 7.50 Ω and = 10.5 V. (a) Do you expect this to increase or decrease the amount of current flowing in the circuit? decrease increase (b) Calculate the magnitude and direction (clockwise or counterclockwise) of the current in this case. magnitude A direction 3. –/2 points Notes Question: Walker4 21.P.062. Suppose point A is grounded ( V = 0) in the figure, in which = 13 V and R = 11 Ω . Find the potential at points B and C . V B = V V C = V 4. –/7 points Notes Question: Walker4 21.P.063. Consider the group of resistors shown in the figure below, where R 1 = 3.3 Ω and = 9.4 V.

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(a) Find the current in each resistor in the figure. I 3.3 = A I 9.8 = A I 1.2 = A I 6.7 = A (b) Is the potential at point A greater than, less than, or equal to the potential at point B ? lesser greater equal (c) Determine the potential difference between the points A and B . V 5. –/1 points Notes Question: Walker4 21.P.068. Find the equivalent capacitance between points A and B for the group of capacitors shown in the figure below, where C 1 = 13 µF and C 2 = 7.5 µF. µF 6. –/3 points Notes Question: Walker4 21.P.072. Consider the group of capacitors shown in the figure below, where C 1 = 17 µF and C 2 = 8.8 µF. Terminals A and B are connected to a 9.0-V battery. Find the energy stored in each capacitor. E 17 µF = J E 8.8 µF = J E 22 µF = J 7. –/5 points Notes Question: Walker4 21.P.074. Two capacitors, one

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